学进去-教育应平等而普惠
试题
类型:听音,选择听到的内容
难度系数:0.85
所属科目:小学英语
听录音,将你听到的单词的序号填到括号中,读两次。
(      ) 1. A. clean                 B. clever                 C. candy
(      ) 2. A. funny                 B. sunny                 C. finish
(      ) 3. A. old                    B. our                    C. robot
(      ) 4. A. Saturday            B. Sunday               C. schedule
(      ) 5. A. salad                 B. sweet                  C. slow
(      ) 6. A. healthy             B. thirsty                  C. fresh
(      ) 7. A. flower               B. window               C. windy
(      ) 8. A. beef                  B. feet                    C. meet
(      ) 9. A. cow                  B. wow                  C. how
(      ) 10. A. always             B. sometimes          C. usually
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

用户名称
2019-09-19

y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

用户名称
2019-09-19
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